added args warn for shell

Signed-off-by: Mark Bolwell <mark.bollyuk@gmail.com>

tasks/section_4/cis_4.1.x.yml

@@ -121,6 +121,8 @@
   block:
       - name: "4.1.12 | L2 | AUDIT | Ensure successful file system mounts are collected"
         shell: for i in  $(df | grep '^/dev' | awk '{ print $NF }'); do find $i -xdev -type f -perm -4000 -o -type f -perm -2000 2>/dev/null; done
+        args:
+            warn: false
         changed_when: false
         failed_when: false
         check_mode: no